Heat up a pan and cook the Gochujang sauce till it bubbles then add 500ml of water, put the cabbage, carrots, onion and spring onions and cook for 8 minutes. Once the vegetables have softened slightly, add in the tofu and potatoes and cook for 5 minutes, the sauce should thicken slightly. Turn off the heat and then sprinkle the vegan cheese on top (optional) cover with a lid and turn the heat back on so it will melt the cheese, then garnish with spring onions and sesame seeds.